... 7.2 to 7.6 ppm. Stops eye irritation, cloudy water, and scaling caused by high pH. Boosts chlorine' s ability ... to fight bacteria and algae. Size:0.5kg (or 1lb),1kg (or 2lb ... ),2kg (or 5lb),3kg,4kg (or 10lb),8kg and 10kg of Pillow Bags, Doy Packs,Gusseted Bags. 0.5kg ... 2lb), 2kg (or 5lb), 3kg, 4kg (or 10lb), 8kg and 10kg of Pails, Jars, Jugs, Pots, Tubes, Drums ...